Abstract

The development of mercury ion selective electrode (ISE-Hg) by using ionophore 7,16-Di-(2-methylquinolyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane (DQDC) in an electrode membrane sensing is explained. The study is aimed to construct an ion selective electrode for mercury by immobilization of ionophore DQDC in a polymeric PVC membrane electrode. Membrane electrode was constructed by casting and spin coated methods from the mixture of DQDC and plastisizer in a polymeric PVC matrix dissolved in a tetrahydofuran solvent. The membrane has been characterized and used as a sensing material in an ISE-Hg. The developed ISE-Hggive sensitive and selective response to mercury, working range linearity lies between 0.005 mM – 1.0 mM Hg²⁺, slope 25.82 mV per decade concentration of Hg²⁺ (r² = 0.998).

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